package io.legado.app.data.entities

import android.os.Parcelable
import androidx.room.Entity
import androidx.room.Ignore
import androidx.room.Index
import io.legado.app.constant.AppPattern
import io.legado.app.constant.BookType
import io.legado.app.utils.GSON
import io.legado.app.utils.fromJsonObject
import kotlinx.android.parcel.IgnoredOnParcel
import kotlinx.android.parcel.Parcelize
import java.nio.charset.Charset
import kotlin.math.max

@Parcelize
@Entity(
    tableName = "books",
    primaryKeys = ["name", "author"],
    indices = [(Index(value = ["bookUrl"], unique = true))]
)
data class Book(
    override var bookUrl: String = "",                   // 详情页Url(本地书源存储完整文件路径)
    var tocUrl: String = "",                    // 目录页Url (toc=table of Contents)
    var origin: String = BookType.local,        // 书源URL(默认BookType.local)
    var originName: String = "",                //书源名称 or 本地书籍文件名
    var name: String = "",                      // 书籍名称(书源获取)
    var author: String = "",                    // 作者名称(书源获取)
    override var kind: String? = null,          // 分类信息(书源获取)
    var customTag: String? = null,              // 分类信息(用户修改)
    var coverUrl: String? = null,               // 封面Url(书源获取)
    var customCoverUrl: String? = null,         // 封面Url(用户修改)
    var intro: String? = null,                  // 简介内容(书源获取)
    var customIntro: String? = null,            // 简介内容(用户修改)
    var charset: String? = null,                // 自定义字符集名称(仅适用于本地书籍)
    var type: Int = 0,                          // 0:text 1:audio
    var group: Int = 0,                         // 自定义分组索引号
    var latestChapterTitle: String? = null,     // 最新章节标题
    var latestChapterTime: Long = System.currentTimeMillis(),            // 最新章节标题更新时间
    var lastCheckTime: Long = System.currentTimeMillis(),                // 最近一次更新书籍信息的时间
    var lastCheckCount: Int = 0,                // 最近一次发现新章节的数量
    var totalChapterNum: Int = 0,               // 书籍目录总数
    var durChapterTitle: String? = null,        // 当前章节名称
    var durChapterIndex: Int = 0,               // 当前章节索引
    var durChapterPos: Int = 0,                 // 当前阅读的进度(首行字符的索引位置)
    var durChapterTime: Long = System.currentTimeMillis(),               // 最近一次阅读书籍的时间(打开正文的时间)
    override var wordCount: String? = null,
    var canUpdate: Boolean = true,              // 刷新书架时更新书籍信息
    var order: Int = 0,                         // 手动排序
    var originOrder: Int = 0,                   //书源排序
    var useReplaceRule: Boolean = true,         // 正文使用净化替换规则
    var variable: String? = null                // 自定义书籍变量信息(用于书源规则检索书籍信息)
) : Parcelable, BaseBook {

    fun isLocalBook(): Boolean {
        return origin == BookType.local
    }

    fun isTxt(): Boolean {
        return isLocalBook() && originName.endsWith(".txt", true)
    }

    override fun equals(other: Any?): Boolean {
        if (other is Book) {
            return other.bookUrl == bookUrl
        }
        return false
    }

    override fun hashCode(): Int {
        return bookUrl.hashCode()
    }

    @Ignore
    @IgnoredOnParcel
    override var variableMap: HashMap<String, String>? = null
        get() {
            if (field == null) {
                field = GSON.fromJsonObject<HashMap<String, String>>(variable) ?: HashMap()
            }
            return field
        }

    @Ignore
    @IgnoredOnParcel
    override var infoHtml: String? = null

    @Ignore
    @IgnoredOnParcel
    override var tocHtml: String? = null

    fun getRealAuthor() = author.replace(AppPattern.authorRegex, "")

    fun getUnreadChapterNum() = max(totalChapterNum - durChapterIndex - 1, 0)

    fun getDisplayCover() = if (customCoverUrl.isNullOrEmpty()) coverUrl else customCoverUrl

    fun getDisplayIntro() = if (customIntro.isNullOrEmpty()) intro else customIntro

    override fun putVariable(key: String, value: String) {
        variableMap?.put(key, value)
        variable = GSON.toJson(variableMap)
    }

    fun fileCharset(): Charset {
        return charset(charset ?: "UTF-8")
    }

    fun toSearchBook(): SearchBook {
        return SearchBook(
            name = name,
            author = author,
            kind = kind,
            bookUrl = bookUrl,
            origin = origin,
            originName = originName,
            type = type,
            wordCount = wordCount,
            latestChapterTitle = latestChapterTitle,
            coverUrl = coverUrl,
            intro = intro,
            tocUrl = tocUrl,
            originOrder = originOrder,
            variable = variable
        ).apply {
            this.infoHtml = this@Book.infoHtml
            this.tocHtml = this@Book.tocHtml
        }
    }
}